MESON Chess Problem Database

Problem Display
PID: 65253 (2n5/Bp6/k7/2Q5/8/8/6B1/3K4 w - - 0 1)

Lincoln, Robert A

5th HM., Amirov MT, 2004

2n5/Bp6/k7/2Q5/8/8/6B1/3K4

#2

4 + 3

145 StrateGems 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Qxb6#
    • 1...Sd6
      • 2.Qb6#
    • 1...Se7
      • 2.Qb6#
    • 1...b5
      • 2.Qa3#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Bf1#
        • 2.Qa5#
      • 1...Sd6
        • 2.Qa5#
      • 1...Sa7
        • 2.Qa5#
      • 1...Sxb6!
    • 1.Qb5+?
      • 1...Kxa7
        • 2.Qxb7#
      • 1...Kxb5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qa4#
      • 1...Kxa7
        • 2.Qxb7#
      • 1...Sxa7
        • 2.Bxb7#
      • 1...Sb6
        • 2.Qxb6#
      • 1...b5
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(c);N_GUARD::QAR1(C),XS(c)
    • S(c);N_GUARD::QAR1(C)
    • P(b);SBLOCK::QAR(C)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::QAR1(C)
      • Refutation
        • S(c);XB(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XB(D)::QAR1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • K(a);P-FLIGHT,XB(D)::QAR1(C),XP(b)
      • S(c);SBLOCK,XB(D)::B(B),XP(b)
      • S(c);N_GUARD::QAR1(C),XS(c)
      • P(b);SBLOCK::QAR(C)
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